A change of mental Attitude.
God wants us to understand our need of Him not based on feelings or just having a bad day, it has to be a mental awareness of our failings and thus the desperate situation that we find ourselves in?
In Jeremiah 29:13, the Hebrew word for heart is Lebab, Stonge H3824 it means much more to encompass many areas of our giving of self to God and all that is mentioned.
The emphasis is on real repentance, seeking the mercy and forgiveness of God, rather than the feeling that God loves and if we say sorry all will be well with us and we can continue to have the experience to go on sinning?
Amos 5:4, Matthew 7:7-8, John 3:3, Romans 6:17, 2 Corinthians 4:16, 2 Timothy 2:22, Revelation 3:20.